Automatic weighing-machine



N0. 6l5.l96.

F. H. RICHARDS. AUTOMATIC WEIGHING MACHINE.

Patented Nov. 29, I898.

(Application filed Nov. 18, 1897.) (No Model.) 6 Sheets-Sheet I.

Inventor hitzzesses 32% 6mm m zw Tu: cams PUERS co. wom-uma. WASHINGTQN. u. c.

No. 6l5,l96. Patented Nov. 29, I898. F. H. RICHARDS.

AUTOMATIC WEIGHING MACHINE.

. {Application filed Nov. 18, 1897.) I (No Model.) 1 6 Sheets-Sheet 2.

V eases 6% 6240M me: NORRIS Perms co movou'mo. msmnomu. u. c.

Patented Nov. 29, I898.

F. H. RICHARDS.

AUTOMATIC WEIGHING MACHINE.

(Application filed Nov. 18, 1897.) (No Model) 6 Sheets-Sheet 3.

Int/912107;

h'fnesses;

No. 6l5,l96. Patented Nov. 29, I898.

F. H. mcmums. AUTOMATIC WEIGHING MACHINE.

[Application filed Nov. 18, 1897.) (No Model.) 6 Sheets-Sheet 4.

Minesses [Ia/enter .0. TH: NORRIS PETERS co. PHOTO L1THO..WASH1NUWN. n

No. 6l5,I96. Patented Nov. 29, I898. F. H. RICHARDS.

AUTOMATIC WEIGHING MACHINE.

(Application filed Nqv. 18, 1897.) (No Model.)' 6 Sheets--Sheat 5.

m: Nonms PEYERS 60.. momumu WASHINGTON. n. :4

Patented Nov. 29, I898.

' F. H. RICHARDS.

AUTOMATIC WEIGHING MACHINE. [Application filed Nov. 18,1897.) No Model.) 6 Sheets-Sheet 8.

Witnewes Inventor m: NORRIS FEYERQ 0a.. PHOYO-LIYHQ. WASHINGTON, o. c.

UNITED STATES PATENT OFFICEG FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT.

AUTOMATIC WEIGHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 615,196, dated November 29, 1898,

Application filed November 18, 1897. Serial No.-659|023. (No model.)

To aZZ whom it may concern:

Be it known that I, FRANCIS II. RICHARDS, a citizen of the UnitedStates, residing at Ilartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Automatic Weighing-Machines,of which the followingis a specification.

This invention relates to weighing machines, and especially to an automatic weighing machine for weighing predetermined quantities of granular or similar material.

More especially the machine embodying my present invention is in the nature of an improvement upon the type of overloading weighing-machines shown in prior patents granted to me in which a true load is obtained by removing the surplus from'an excessive charge delivered to the load-receiver of the machine.

One of the main features of these improvements is the employment in connection with a suitable valve for controlling the supply of material to the load-receiver or bucket and in connection with a suitable valve-actuator,

which will usually be the valve-opening actuator or counterweighed lever shown in my prior patents, of an extensible thrust-transmitter or thrust-rod between the valve and its actuator, one of the members of which is slidable on the other, preferably for the purpose of moving into or out of range of operation of the valve-opening actuator. Usually one member of'this extensible transmitter or rod will be pivotally connected with the valve and the other or shiftable member will be movable longitudinally of that which is connected to said valve, and hence the shiftable member of the transmitter will have not only a longitudinal movement on the member with which it cooperates, but also a transverse movement therewith due to the swinging of the transmitter or rod as a whole. Obviously as these devices will be embodied in an automatic weighingmachine the sliding movement of this shiftable member of the transmitter will be effected, preferably automaticmanner, but I prefer to connect the two members of said transmitter by means of a toggle which when straightened out will hold the shiftable member in operative relation with the valve-actuator, and when struck will withdraw it from said position. This toggle may be connected with one of the main members of the weighing-machine, as just stated, and preferably with a regulator in the path of material discharged from the load-receiver, the organization of these parts being such that the toggle will not be straightened out after a load is discharged by the machine until the regulator shall have returned to its normal or non-regulating position. Usually in order to permit freedom of action of the parts the toggle will be joined to such controlling member or regulator by means of a linkage or similar connection.

As before stated, the machine illustrated in the drawings of this specification is of the overloading type, and as to one of the features thereofviz.,the load-red ucing means--- this invention is in the nature of an improvement upon that shown and described in Letters Patent No. 607,467, granted to me July 19, 1898. In said Letters Patent I have illustrated load-reducing mechanism in which the load-receiver has a load-reducing opening from which material is discharged continuously when there is a partial or full charge in the bucket, and in connection with such loadreducing opening a stream-deflector is used for delivering material alternately into a main-load receiver and a surplus receiver. In the present case I hax e retained this essential feature of a deflector controllinga continuously-running stream discharged from the load-receiver; but this stream controller or deflector is operative by the load -discharger, and is preferably carried thereon and has its axis of movement coincident therewith, the construction being such that the two parts move in unison. Obviously when the parts are organized in this manner the movements of the stream-deflector will be controlled absolutely by the loaddischarger. If the latter isopen, the deflector should discharge into the main discharge spout or receiver the material which forms part of the completed true load, while if the closer is shut the stream-deflector will permit the surplus or excess in the receiver to run out into a surplus-receiving spout.

The machine illustrated herein is designed especially as a means for weighing relatively small loads, and it is important that in such a construction the load-reducing devices should be simple in construction and operation, while controlling properly the material discharged from the load -reducing opening or spout. An important element of this part of my present improvements is a guard for preventing eiflux of material through the load-reducing opening or spout at an excessive rate, and this guard will be disposed over the receiving end of the spout and within the receiver or bucket, preferably at an acute angle to the vertical, so as to break the force of the falling material or overload supplied to the bucket and prevent the particles from being forced violently through the reducing-spout. In the construction illustrated this guard is in the form of a plate extending from end to end of the bucket, and the lower edge of the guard-plate dips into the mass of material to such an extent that the line of the angle of repose of the material between the same and the receiving end of the load-reducing spout will pass below the upper edge of the receiving end of the spout, as will be obvious by referring to Figure 3, this organization of the parts assuring the delivery of material through the load-reducing spout at a relatively low rate of speed.

Other features of this invention relate to the interlocking of the loaddischarger and the stream-deflector with the regulator and the valve mechanism controlling the supply of material to the bucket, to a novel form of pivot-bearing for supporting the bucket and the beam mechanism, and to other details, which will be described more fully hereinafter.

In the drawings accompanying and forming part of this specification, Fig. 1 is a rear elevation of a weighing-machine embodying my present improvements, a part of the framework being broken away. Fig. 2 is a side elevation of the same, with parts removed, as viewed from the left in Fig. 1, showing the parts in position for making up aload. Fig. 3 is a central vertical transverse section of the same, with the parts in the same positions as in Fig. 2. Fig. 4 is a view similar to Fig. 2, showing the positions of the parts on the overloading of the receiver. Fig. 5 is a similar view showing the positions of the several parts when the bucket rises and the closerlatch is tripped to permit opening of the closer, and Fig. 6 is a similar view showing the positions of the parts when the closer is wide open and the regulatoris in its working position.

Similar characters designate like parts in all the figures of the drawings.

Any suitable framework may be employed for carrying the several operative parts of my improved machine. That illustrated herein is similar to the framework of weighing-machines shown in my prior patents and embodies a chambered supporting-base having load and surplus discharging spouts or outlets, such as 3' and 3", and this base 3 supports a pair of frames or uprights i and 4-, which are connected at their upper ends by the usual cross-beam 5, carrying a suitable stream-supplying device or hopper H.

The stream-controlling means may be of any suitable type; but in this case I have illustrated a single valve 72, oscillatory about an axis passing through the supply-stream and adapted to close under the spout II in the usual manner. This valve will be counterweighted, preferably as shown at 90, so that it will close by reason of its own weight.

The valve-opening actuator may be substantially similar to those shown in my prior patents for small weighing-machines, in some of which the opening of the valve is effected by a combined action due to the rise of the beam mechanism with the bucket and to the return of the regulator to its normal position.

In the drawings of this specification the load-receiver or bucket will be of the usual type,and is indicated herein by G. This loadreceiver will be mounted substantially in the usual way on beam mechanisms, but preferably at different points, both transversely and vertically of the load-receiver. This will be obvious by. reference to the drawings, in which two beam mechanisms B and B are shown disposed one over the other, the former of which is pivoted to the framework at a considerable distance to one side of the central vertical plane of the bucket, while the latter is pivoted to the framework in substantially the same manner, but preferably in such vertical plane of the load -receiver. The bucket will also be carried on the beam mechanism at different points in its height, the pivot-bearings thereof being designated in a general way by p and 19, respectively.

It will be noticed that the pivot-bearing at the upper end of the bucket is at one side of the central vertical plane of the latter, while the corresponding pivot-bearing at the lower end of the bucket is at the opposite side of such central vertical plane.

The pivot-bearings by which the beams are supported on the framework are indicated in a general Way by Z) and b, respectively, and these pivot-bearings, as well as those shown at p and p, are of a novel type, but as all are of substantially the same construction a description of one will be suflicient for all. Each embodies as its essential features two bearing members, one of which is carried by a supporting member-as, for example, the frameworkand the other of which is carried by a supported member, as the beam 13. One of these bearing members is in the form of a stud or roll (indicated herein by 10) having a circular periphery, this hearing member being preferably fixed to the part by which it is carried. The other member of each bear- IIO ing is in the nature of a part having a bearing-surface, such as 12, on which the member 10 is adapted to roll slightly, the bearing-face 12 being considerably longer than the diameter of said roll. At the ends of the bearingsurface 12 I provide a pair of stop-faces, such as 13 and 13, by means of which the rolling movements of the member 10 may be limited. It will be seen that by employing pivotbearings of this type considerable freedom of movement of the bucket is permitted in lateral direction, and this movement will be sufficient to compensate for changes of position of the parts of the bucket and the beam mechanisms relatively to one another during the oscillation thereof; but this movement of course should not be sufficient to impair the operation of the weighing mechanism.

Owing to the fact that the counterweighted arms of the two beam mechanisms B and B have different ranges of movement it will be seen that these should be loosely connected by some suitable guide device, and that only a single stop, such as 15, on the framework will be necessary for determining the normal position of the beams. A link is shown at 16, and it is pivotally connected to the counterweights of the respective beams.

The load-receiver of course embodies, as an essential element thereof, some suitable member shiftable for discharging the loads made up therein, and this load discharger or closer will be of the usual oscillatory type (indicated herein at L) and supported on the bracket at the lower end thereof, it being preferably counterweighted. This load-discharger should also be connected substantially in the usual manner by means of a rod, such as 515, with a suitable rocker or interlocking stop 510, cooperative with a corresponding interlock 75, movable in unison with the main valve 72. The construction and operation of these interlocking or blocking devices are well understood.

For the purpose of holding the load-discharger in its shutposition the rocker 510 may have projecting therefrom a stop-arm 510', of the usual type, cooperative with a counterweighted by-pass latch, such as 82, on the side of the load-receiver. The manner in which this latch will be tripped will be described in detail hereinafter.

One of the principal features of the mechanism shown in the drawings is a thrust transmitter between the valve and its actuator of such a construction that one of the members thereof maybe shifted on the other to extend. or shorten the transmitting member or thrust-rod. In this case the upper member of the thrust-transmitter is pivoted to a rock-arm 72 on the main valve 72, and this member of the thrust-transmitter is des ignated herein by 40. It is in the form of a rod and constitutes one of the two main members of the thrust-transmitter or thrust-rod between the valve and its actuator. The other member of this transmitter or rod is indicated herein by 45 and is mounted to slide on the rod 40, it having in this case a pair of guidelugs, such as 41 and 41, through which the rod 40 passes. At its lower end the thrustrod 45 is intended to cooperate substantially in the usual manner with the beam mechanism B, said thr'ust member being forked, as at 45, for this purpose. The two members of the thrust-transmitter may be connected in any suitable manner-as, for instance, by a toggle, the two links of which are indicated by 46 and 46, the upper being pivoted to the rod 40 and the lower to the rod 45 and the toggle also being preferably connected at the knuckle thereof to another link 47, which may be pivotedin turn to one arm of an angle-lever 48 on the framework, the other arm of which may be connected by means of a rod 49 to a suitable controlling device, such as the regulator, which will usually be disposed in the path of material discharged from the load-receiver. This regulator is designated herein by R and may be of the ordinary counterweighted type.

It will be clear that if the regulator is in its normal idle position the toggle will be straightened out and the two parts will be in position to permit the opening of the main valve 72, while if the regulator is depressed by the weight of the load discharged thereonto the toggle will be struck and the rod 45 will be thrown up to such an extent that the beam mechanism will not be effective to open such valve. For these reasons it will be seen that the beam mechanism and the regulator act conjointly and that unless the beam B is in the position shown in Fig. 2 when the regulator returns to its normal position the thrust-transmitter will not have its full stroke for operating the valve 7 2. At such time the beam mechanism constitutes a resistance device, and the member 45 of the thrust-rod does not move longitudinally, but also forms a resistance device, which by reaction causes the upward movement of the rod v4O on the straightening of the toggle.

It will be noticed that the latch-tripper is mounted in this case on the thrust-transmitting member 45 and that said tripper, which is indicated herein by 85, is in the nature of a counterweighted by-pass substantially of the usual construction. This by-pass tripper is not effective when the bucket descends with its charge, but forms a fixed abutment when the bucket rises after discharging its surplus material, and against this fixed abutment the arm 82' of the latch 82 strikes when the poising-line is reached.

As already stated, the load-reducin g means illustrated herein constitutes an important feature of the machine, and in the construction shown the load-receiver has a load-reducing opening from which material will be continuously discharged as long as the mass in the bucket is of suflicient height. The reduction of the load will preferably take place through a red ucing-spout in the lower end of the bucket, such a spout being indicated at 55. \Vith this spout will cooperate a suitable stream-controller or valve, preferably in the form of a deflector, by means of which the trajectory of the discharged material may be changed without affecting the volume of the reducing-stream. This deflector is preferably operative with the load-discharger L and in the construction shown is carried by said load-discharger, so as to move in unison therewith. The deflector is indicated in a general way by and may be an oscillatory panvalve supported on and fixed to the closershaft, (indicated by 57.) It will be seen that when the closer is shut the material discharged from the spout will pass into the auxiliary discharge spout or receiver 3, while if the closer is open the valve 56 will be swung under the mouth of the spout 55 and will deliver the surplus discharged therefrom into the main discharge chamber or spout 3.

As before stated, the main valve 72 and the closer L are interlocked with each other, and hence the deflector 56 will also be interlocked with the main valve. As it is intended that the load-discharger and the regulator shall also have interlocking stops similar to those indicated herein at 510 and 75, it will be clear that the deflector 56 will be interlocked with the regulator as well as with the main supplyvalve. The interlocking stops for the regulator and the closer or deflector may be of the usual type and will preferably be carried, respectively ,by said regulator and closer. They are indicated by 59 and 60, respectively. All of these interlocking stops are in the present case substantially L-shaped in cross-section, the flanges only cooperating and serving as looking devices or stops.

For the purpose of preventing the too sudden or violent flow of material into and through the load-reducing spout 55 I prefer to employ in connection therewith a guard substantially such as that hereinbefore described. This guard will be preferably a plate, such as 61, projecting from the inner rear wall of the bucket andinclined at an acute'angle to the perpendicular. This plate may extend from end to end of the bucket, and its lower edge 61 will be so disposed with reference to the receiving end 55 ofthe load-reducing spout as to intersect the line of the normal angle of repose of material, which line passes through the upper edge of the opening 55. By means of this guardplate substantially all of the pressure of the charge at the receiving end of the spout may be removed, and the surplus material may flow out gradually and in such a manner as not to interfere with the proper operation of the weighing mechanism.

The operation of a machine constructed in accordance with my present improvements, as illustrated in the drawings of this specification, is as follows: It being understood that the parts are in their normal positions, (shown in Fig. 2,) with the main supply-Valve 7 2 wide open, material will be delivered from the supply-spout H into the load-receiver G until there is an overload in the latter, whereupon said receiver will descend to the load-poising line, the latch-arm 82 passing by the tripper 85 and the beam mechanisms and interlocks for the main valve 72 assuming the positions shown in Fig. 4. During this time of course material will be discharged continuously from the spout 55 into the surplus-receiving discharge-spout 3", from which the material may be carried away in any suitable manneras, for instance, by means of a conveyor. (Not shown.) 011 the reduction of the overload in the receiver by the discharge of material from the spout 55 said receiver will of course rise gradually until it reaches the poising-line and there is a true load in the bucket, whereupon the arm 82 of the latch will strike the latch-tripper and the latch 82 will be released. As the closer L opens (see Fig. 5) the stop will swing under the lower edge of the stop 59 on the regulator and will prevent the shift ing of the regulator until the closer is in its wide-open position, (shown in Fig. 6,) whereupon the regulator will be carried down by the superincumbent material and will be shifted, as shown in Fig. 6, to strike the toggle and raise the transmitter member4l5. As the closer opens, the deflector 56 is of course swung under the mouth of the spent 55, and the stream discharged from said spout is diverted into the discharge-spout 3, to be delivered therefrom as a part of the completed true load. This shifting of the deflector 56 takes place almost instantly on the beginning of the opening movement of the closer. The closer will of course shut before the regulator returns to its normal position, and as soon as the closer is shut its interlocking stop 510 will of course be withdrawn from the path of movement of the stop 75; but the valve 72 will not be free to open, as the rod 45 will be in its inoperative position. As soon, how ever, as all of the discharged load shall have passed by the regulator the latter will of course close, and its counterweight will become eifective to straighten the toggle against and, by pushing upon the rod 40, effect the opening of the valve 72, when all of the parts will be in position for making up a new load.

Having described my invention, I claim 1. The combination with a supply-hopper and with a valve, of a load-receiver; a supporting scale-beam for the load-receiver; an extensible thrust-transmitter connected with the valve and bearing against the scale-beam and embodying a pair of members of which one is slidable on the other; and means for automatically lifting said slidable member, said means being operated by the load on the discharge thereof.

2. The combination, with a supply-hopper and a valve, of a load-receiver; a scale-beam for the load-receiver; a regulator supported adjacent the load-receiver and adapted to be shifted intermittingly bythe loads discharged extensible thrust-transmitter between said valve and the valve-actuator and embodying a pair of members one of which is slidable on the other, and means for automatically sliding said members.

4. In a weigl1ing-1nacl1ine,the combination, with a valve and with a valve-actuator, of an extensible thrust-transmitter between said valve and the valve-actuator and embodying a pair of members one of which is slidable on the other; a connecting device between said members; and means for automatically operating said connecting device to shift the slidable member of the thrust-transmitter relatively to the other.

5. Ina weighing-machine, the combination, with a valve and with a valve-actuator, of an extensible thrust-transmitter between said valve and the valve-actuator and embodying a pair of members one of which is slidable on the other; a toggle between said members;

, and means for automatically straightening and striking said toggle.

6. Inaweighing-machine, the combination, with a valve and with a valve-actuator, of an extensible thrust-rod pivotally connected at one of its ends with the valve and cooperative at its other end with the valve-actuator and embodying two sections; a toggle connecting said sections of the thrust-rod; and means for automatically straightening and striking said toggle to shift the lower section of the rod longitudinally of the other.

7. In a weighing-machine, the combination, with a valve and. with weighing mechanism embodying a valve-opening actuator, of an extensible thrust-transmitter between said valve and the valve-opening actuator and embodying a pair of members one of which is slidable on the other into and out of operative relation with the valve-opening actuator. 8. Inaweighing-machine, the combination, with a valve and with weighing mechanism embodying a valve-opening actuator, of an extensible thrust-transmitter between said valve and the valve-openin g actuator and embodying a pairof members one of which is slidable on the other into and out of operative relation with the valve-opening actuator and is operative by a movable member of the weighing-machine.

9. In a weighing-machine, the combination, with a valve and. with weighing mechanism embodying a valve-opening actuator, of an extensible thrust-transmitter between said valve and the valve-opening actuator and embodying a pair of members one of which is slidable on the other into and out of operative relation with the valve-openin g actuator, and a regulator connected with said slidable member of the thrust-transmitter for operating said member.

10. I11 a weighing-machine, the combination, with a valve and with weighing mechanism embodying a valve-opening actuator, of an extensible thrust-transmitter between said valve and the valve-opening actuator and embodying a pair of members one of which is slidable on the other into and out of operative relation with the valve-opening actuator; a toggle connecting said members; a regulator; and a linkage connecting said regulator and the toggle.

11. In a weighing-machine, the combination, with a valve and with a valve-actuator, of an extensible thrList-transmitter between said valve and the valve-actuator and embodying a pair of members one of which is slidable 011 the other into and out of operative relation with the valve-actuator; loaddischarge-controlling members; interlocking stops between said load-discharge-controlling members; and connecting means between one of said load-discharge-controlling members and the slidable member of the thrusttransmitter for shifting said slidable member.

12. In a weighing-machine, the combination, with a valve and with a valve-actuator, of an extensible thrust-transmitter between said valve and the valve-actuator and em: bodying a pair of members one of which is slidable on the other into and out of operative relation with the valve-actuator; a loadreceiver; a load-discharger; aload-receiving regulator; interlocking stops between said load-discharger and the regulator; and connecting means between one of such load-controlling members and the slidable member of the thrust-transmitter for shifting said slidable member.

13. In a weighing-machine, the combination, with overloading means embodying a valve, of a valveactuator; an extensible thrust-transmitter between said valve and the valve-actuator and embodying a pair of members one of which is slidable on the other into and out of operative relation with the Valve-actuator; a load-receiver embodying a member shiftable for discharging the load, and also having a load-reducing opening; a regulator; main and auxiliary receivers for the weighed loads and the surplus material; a deflector cooperative with the load-reducing opening and operative for causing the entrance of material into the main and auxiliary receivers alternately; and connecting means between the slidable member of the thrust-transmitter and one of such movable loadcontrolling members for shifting said slidable member.

14. In a weighing machine, the combination, with overloading means embodying a valve, of a valve-actuator; an extensible thrust-transmitter between said valve and the valve-actuator and embodyinga pair of mean bers one of which is slidable on the otherinto and out of operative relation wit-h the valveactuator; a load-receiver having a load-reducing opening; interdependent load-controlling members-win, a load-discharger, a regulator, and a deflector controllingthe material discharged from the load-reducing opening; and connecting means between the regulator and the slidable member of the thrust-transmitter for shifting said slidable member.

15. In a weighing-machine, the combination, with overloading means, of a load-receiver having a load-reducing opening; a load-discharger; and a stream-controller for the load-reducing opening and operative with the load-discharger.

16. In a weighing-machine, the combination, with overloading means, of a load-1e ceiver having a load-reducing opening; a load-discharger; and a stream-controller for the load-reducin g opening and carried by the load-discharger.

17. In a weighing-machine, the combination, with overloading means, of a load-receiver having a load-reducing opening; an oscillatory load-discharger; and an oscillatory stream-controller for the load-reducing opening and having its axis of movement coincident with that of the load-discharger.

18. In a weighing-machine, the combination, with overloading means, of a load-receiver having a load-reducing opening; an oscillatory load-discharger; and an oscillatory stream-controller for the load-reducin g opening and carried by, and movable in unison with, the load-discharger.

19. In a weighing-machine, the combination, with overloading means, of a load-receiver having a load-reducing opening; an oscillatory load-discharger; an oscillatory stream-deflector controlling the load-reducing opening and carried by, and movable in unison with, the load-discharger, and operative for causing the flow in different directions alternately of the material discharged from the load-reducing opening; and receivers for material discharged from the load-re ducing opening.

20. In a weighii'ig-machinc, the combination, with overloading means, of a load-receiver having a continuously-discharging load-reducing opening; a load-discharger; a main receiver for completed loads; a surplusreceiver; and an oscillatory stream-deflector controlling the load-reducing opening and carried by, and movable in unison with, the load-discharger, and operative for causing the flow of the material discharged from the load-reducing opening into the main and surplus receivers alternately.

21. In a wei'ghing-machine, the combination, with overloading means, of a load-receiver having a load-reducing opening; an oscillatory load-discharger; a regulator; a stream-controller for the load-reducing opening and operative with the load-disoharger; and interlocking stops between the regulator and the load-disoharger.

22. In a weighing-machine, the combination, with overloading means, of a load-receiver having a load-reducing opening; an oscillatory load-discharger; a regulator; an oscillatory stream-controller for the load-reducing opening and carried by, and movable in unison with, the load-discharger; and interlocking stops between the regulator and the load-discharger.

23. In a weighing-machine, a load-receiver having a load-reducing opening, and a guardplate within the load-receiver and disposed over said opening and having its lower edge in position to intersect that line of the angle of repose of material delivered to the bucket, which line passes through the upper edge of said load-reducing opening.

FRANCIS ll. RICHARDS.

\Vitnesses:

F. N. UHASE, JOHN O. SEIFERT. 

